Display messagesPossible causes/consequences andMSolutions
Check DieselExhaustFluid seeOperator' sManual
In addition ,th eyellow ;enginediagnostic indicator lamp lights up
and awarning tone sounds.
The DE Freducin gagen tis contaminated, diluted or is no tcomplian t
wit hIS O 22241.
XHav eth eDE Ftan kcleane dand refilled at aqualified specialist
workshop as soo nas possible.
å
XX starts remaining
The yellow ;enginediagnostic indicator lamp also lights up and
three short warning tone ssound.
Afte rth emessage appear sfor th efirst time, th eremaining DE Fsupply
will last for approximately 1200 mile s(1900 km). The engin ecan then
only be started another 16 times .
The number of remaining engin estart sxx
(16to 0)is shown in th e
message every time th eengin eis started.
The DE Freducin gagen tis contaminated, diluted or is no tcomplian t
wit hIS O 22241.
The exhaust gas aftertreatmen tis malfunctioning or an emission rel -
evan tmalfunction has occurred .This malfunction or defec tcan dam-
age th eexhaust gas aftertreatment.
XVisit aqualified specialist workshop immediately.
å
Idl eMod e
The yellow ;enginediagnostic indicator lamp also lights up and
three short warning tone ssound.
You canno tdrive th evehicl eat aspeed exceedin g 5mph (8 km/h).
XVisit aqualified specialist workshop immediately.
Vehicles wit hcommercial vehicle approva l
Display messagesPossible causes/consequences and MSolutions
Check DieselExhaustFluid seeOperator' sManual
The DE Fsupply has dropped belo w1.5US gal (5. 5l).
XAd dDE Fsupply (Ypage 128).
The display message only disappear swhen th evehicl eis stationary,
at th elatest after 20 seconds as soo nas you switch on th eignition
or start th eengin eafter toppin gup.
å
XX starts remaining
Three short warning tone salso sound.
Afte rth emessage appear sfor th efirst time, th eremaining DE Fsupply
will last for approximately 1200 mile s(1900 km). The engin ecan then
only be started another 16 times .
The number of remaining engin estart sxx
(16to 0)is shown in th e
message every time th eengin eis started.
XAd dat least 1. 5US gal (5.5l)of DEF (Ypage 128).
188Display messages
On-board computer and displays
Display messagesPossible causes/consequences andMSolutions
å
IdleMod e
The yellow ;enginediagnostic indicator lamp also lights up and
three short warning tone ssound.
You canno tdrive th evehicl eat aspeed exceedin g 5mph (8 km/h).
XAddat least 1. 5US gal (5.5l)of DEF (Ypage 128).
The display message and the yellow ;engine diagnostic indi-
cator lamp only disappear when the vehicle is stationary, at the
latest after 20 seconds as soon as you switch on the ignition or start
the engine after topping up.
Check DieselExhaust Fluid seeOperator's Manual
In addition, the yellow ;engine diagnostic indicator lamp lights up
and a warning tone sounds.
The DEF reducing agent is contaminated, diluted or is not compliant
with ISO 22241.
XHave the DEF tank cleaned and refilled at a qualified specialist
workshop as soon as possible.
å
XX starts remaining
The yellow ;engine diagnostic indicator lamp also lights up and
three short warning tones sound.
After the message appears for the first time, the remaining DEF supply
will last for approximately 1200 miles (1900 km). The engine can then
only be started another 16 times.
The number of remaining engine starts xx
(16to0) is shown in the
message every time the engine is started.
The DEF reducing agent is contaminated, diluted or is not compliant
with ISO 22241.
The exhaust gas aftertreatment is malfunctioning or an emission rel-
evant malfunction has occurred. This malfunction or defect can dam-
age the exhaust gas aftertreatment.
XVisit a qualified specialist workshop immediately.
å
Idle Mode
The yellow ;engine diagnostic indicator lamp also lights up and
three short warning tones sound.
You cannot drive the vehicle at a speed exceeding 5 mph (8 km/h).
XVisit a qualified specialist workshop immediately.
Display messages189
On-board computer and displays
Z
Engine
Display messagesPossible causes/consequences andMSolutions
?
Coolant Stop, turnengine off
The coolant temperature is too high.
If the vehicle is stopped after being subjected to extreme loads, the
coolant warning lamp may come on when the ignition is switched on
or the engine is restarted. Such loads can be, for example, driving in
mountainous terrain or driving with a trailer.
XLet the engine run at idling speed for approximately one minute.
XConsult a qualified specialist workshop if the display message con-
tinues to be shown.
*
Coolant Check level
The coolant level is too low.
Never run the engine if the coolant level is too low. The engine could
overheat and be damaged.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XSwitch off the engine and let it cool down.
XAdd coolant and be sure to observe the warning notes
(Ypage 285).
XIf you need to add coolant frequently, have the engine cooling sys-
tem checked at a qualified specialist workshop.
7
Reserve fuel Driveto a filling stat.
The fuel level has fallen into the reserve range.
XRefuel at the nearest gas station (Ypage 126).
:
WaterinfuelVisitworkshop
The water that has collected in the water separator has reached the
maximum level.
XDrain the water separator (Ypage 225).
m
Fuel filter Visitworkshop
The fuel filter is dirty.
XHave the fuel filter element replaced as soon as possible at a quali-
fied specialist workshop.
4
Engine oil Add 1.0quart(Canada: 1.0liter)
The oil level is too low.
XCheck the oil level the next time you refuel (Ypage 221), and add
oil.
4
Engine oil levelNot when eng. run‐ning
You want to check the engine oil level even though the engine is still
running.
XSwitch off the engine.
XCheck the oil level (Ypage 221).
190Display messages
On-board computer and displays
Display messagesPossible causes/consequences andMSolutions
4
Engine oil levelReduce oil level
You haveadded to omuc hengin eoil. There is aris kof damaging th e
engin eor catalytic converter.
XChec kth eoil level (Ypage 221).
XIf theoil level is to ohigh :hav eth eengin eoil extracted at th enext
qualified specialist workshop .
XIf theoil level is correct: hav eth emalfunction rectifie dat th enext
qualified specialist workshop .
4
Engine oil levelStop, turnengineoff
There is no tenough or no oil in th eengine. There is adanger of engin e
damage.
XStop th evehicl eas soo nas possible, payin gattention to roa dand
traffic conditions.
XChec kth eoil level wit hth eoil dipstick (Ypage 222).
XIf theengin eoil level is correct: hav eth emalfunction rectifie d
immediately at aqualified specialist workshop .
XIf theengin eoil level is to olow: hav eth evehicl etowed to aqualified
specialist workshop .
4
Oil sensor Visitworkshop
There isamalfunction in th eengin eoil level display.
XHav eth evehicl echecke dimmediately at aqualified specialist
workshop .
Driving systems
Display messagesPossible causes/consequences and MSolutions
_ _ _
Cr. control
The activation condition sfor cruise control hav eno tbeen met .
You can only activat ecruise control from speeds of 20 mph
(30 km/h).
Cruise contro l
Visit workshop
Cruisecontrol has been deactivated due to amalfunction .
XHavecruise control checke dat aqualified specialist workshop .
Display messages191
On-board computer and displays
Z
Display messagesPossible causes/consequences andMSolutions
LaneKeep. Assisttemporarilyunavailable
and th eà indicator lamp lights up yellow.
Lan eKeepin gAssis tis deactivated and temporarily inoperative.
Possibl ecauses are:
RThere are no lan emarking spresent.
RThe camera' sfunctionalit yis impaire ddue to heav yrain ,snow or
fog .
RThe camera canno trecogniz eth eroa dmarkings:
-It is to odark .
-The lan emarking sare wor nor are covered, for example, by dir tor
snow.
RThe windshield is dirty in th ecamera' sfield of vision .
XStop thevehicl epayin gattention to roa dand traffic conditions.
XSecur eth evehicl eto preven tit from rollin gaway (Ypage 129).
XClean th ewindshield (Ypage 236), particularly in th ecamera' s
field of vision .
If th eà indicator lamp goe sout ,Lan eKeepin gAssis tis opera-
tional again .
LaneKeep. AssistinoperativeLan eKeepin gAssis tis faulty.
XHav eLan eKeepin gAssis tchecke dat aqualified specialist work-
shop.
Blind Spo tAssistinoperativeBlind Spot Assis tis faulty.
XHav eBlind Spot Assis tchecke dat aqualified specialist workshop .
Collision Preven‐tionAssist inoper ‐ative
COLLISION PREVENTION ASSIST is faulty.
XHaveCOLLISION PREVENTION ASSIST checke dat aqualified spe -
cialist workshop .
Recognition by th eradar sensor system can be impaire din th ecas eof:
Rdirt, ice or anythin gelse covering th esensor s
Rsnow or heav yrain
Rinterferenc efrom other radar source s
Rthere are strongradar reflections, for exampl ein parking garages
Ranarrow vehicl etraveling in front, e.g. amotorbik e
Ravehicl etraveling in fron ton adifferen tlin e
XClean th eradar sensor system area .
Intervention Cross‐windAssistThe d indicator lamp also flashes in th einstrumen tcluster.
Crosswin dAssis thas intervened perceptibly.
192Display messages
On-board computer and displays
Tires
Display messagesPossible causes/consequences andMSolutions
Tire pres. Adjustpres.
O
The pressure is insufficient in one or more tires, or the pressures of the
individual tires differ significantly.
XCheck the tire pressure at the next opportunity and correct it if
necessary (Ypage 254).
Tire pres.
monitor inoperative
The tire pressure monitor has malfunctioned.
XHave the tire pressure monitor and the wheels checked at a quali-
fied specialist workshop.
Tire pres.
monitor currentlyunavailable
The tire pressure monitor function is temporarily unavailable due to
radio interference or undervoltage.
XOnce the causes have been remedied, the tire pressure monitor is
automatically activated.
Tire pres.-
monitorinoperativeNo wheel sensors
The tire pressure monitor is not receiving signals from one or more
wheels because:
Ra wheel has been replaced with the spare wheel without wheel
electronics.
Rthe maximum temperature on one of the wheel electronics units has
been exceeded.
Rthe wheel electronics are malfunctioning.
XHave the tire pressure monitor and the wheels checked at a quali-
fied specialist workshop.
Check tire(s)
O
The pressure of one or more tires has dropped significantly. If the tire
pressure monitor has detected the affected wheel, the wheel position
is also displayed.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XCheck the tires.
XRepair or change the wheel if necessary (Ypage 267).
XCheck the tire pressure and correct it if necessary (Ypage 254).
The display message disappears automatically after driving for a
few minutes with the corrected tire pressure.
Warning Tire defect
O
One or more tires is losing air rapidly. If the tire pressure monitor has
detected the affected wheel, the wheel position is also displayed.
XStop the vehicle without making any sudden steering or braking
maneuvers, paying attention to the traffic conditions as you do so.
XRepair or change the wheel (Ypage 267).
Displa y messages193
On-board computer and displays
Z
Vehicle
Display messagesPossible causes/consequences andMSolutions
Ð
SteeringAssistanceFailure
The power assistance for the steering has malfunctioned. You need to
steer more forcefully.
XCarefully continue to a qualified specialist workshop and have the
steering checked immediately.
#
Battery/AlternatorVisit workshop
The battery is not being charged. Possible causes are a defective
alternator or a torn poly-V-belt.
XStop the vehicle as soon as possible, paying attention to road and
traffic conditions.
XCheck the poly-V-belt.
XIf the poly-V-belt is torn: do not continue driving. Consult a qualified
specialist workshop.
XIf the poly-V-belt is not damaged: have the vehicle checked as soon
as possible by a qualified specialist workshop.
÷
Electrical Step
The electrical step has retracted or extended only partially or not at all.
XMake sure there is sufficient free space for the electrical step.
XOpen or close the sliding door again.
XIf the electrical step still does not extend or retract fully, push the
step in manually (Ypage 68). Before stepping out, remind the pas-
sengers that the step is missing.
1
Hood open
You are already driving at walking pace, even though the hood is not
closed.
XClose the hood.
9
Please enter PIN:
You have not yet entered your PIN in the mobile phone.
XEnter the PIN for the SIM card.
1
Doors open
You are already driving at walking pace, even though not all the doors
are closed.
XClose the doors.
¦
Check wash. fluidlevel
The washer fluid level is too low.
XAdd washer fluid (Ypage 225).
Key
Display messagesPossible causes/consequences and MSolutions
+
Replace key Visitworkshop
The key is no longer working.
XVisit a qualified specialist workshop.
194Display messages
On-board computer and displays
Indicator and warning lamps in the instrument cluster
When switching on theignition ,som esystems carry out aself-test .Some indicator and warning
lamp smay temporarily tur non or start to flash. This is no tan indication of any problem .Only when
these indicator and warning lights tur non or start flashin gafter th eengin ehas started or during th e
journey has amalfunction occurred .
ProblemPossible causes/consequences and MSolutions
·
The red distanc e
warning lamp
lights up while th e
vehicl eis in
motion .The distanc eto th evehicl ein fron tis to osmall for th espee dselected.
Increase th edistance.
·
The red distanc e
warning lamp
flashes while th e
vehicl eis in
motion .Addition -
ally, an intermit -
tent warning tone
sounds.You are approachin g avehicl eahead at to ohigh aspeed.
XBe prepare dto brak eimmediately.
XPay particular attention to th etraffic situation .You may hav eto
brak eor tak eevasive action .
Ã
The yellow Lan e
Keepin gAssist
indicator lamp
lights up while
you are driving .LaneKeepin gAssist is deactivated.
XActivat eLan eKeepin gAssist if necessar y (Ypage 146).
Ã
The green Lan e
Keepin gAssist
indicator lamp
lights up while
you are driving .LaneKeepin gAssist is operational.
Ã
The red Lan e
Keepin gAssist
indicator lamp
lights up while
you are driving .
Additionally, an
intermittent
warning tone
sounds.You are driving wit hth efron twhee lon alan emarking.
d
The yellow
ASR/ESP®warn-
ing lamp flashes
while th evehicl e
is in motion .GWARNING
ES P
®or AS Ris intervening because at least on eof th ewheels has
reached it stire gri plimit.
Cruis econtrol is deactivated for th eduration of th eintervention .
XAdapt your driving style to suit th eroad and traffic conditions. Do
no tuse to omuc hthrottle.
XDrive slowly.
Indicator and warning lamps in the instrument cluster195
On-board computer and displays
Z